A Solid Cylinder Has a Radius of 0

Multiple Choice

A solid cylinder has a radius of 0.051 m and a height of 0.0030 m.The cylinder is composed of two different materials with mass densities of 1950 kg/m³ and 1470 kg/m³.The cylinder contains an equal mass m of each of the two materials,so that the total mass is M = 2m.What is the mass m?

A) 8.4 × 10^-² kg
B) 2.1 × 10^-² kg
C) 1.4 × 10^-² kg
D) 6.5 × 10^-² kg
E) 4.2 × 10^-² kg